delve in vs ransack

delve in

ransack

verb
  • To violate; to ravish; to deflower. 

  • To loot or pillage. See also sack. 

  • To make a vigorous and thorough search of (a place, person) with a view to stealing something, especially when leaving behind a state of disarray. 

noun
  • Eager search. 

How often have the words delve in and ransack occurred in a corpus of books? (source: Google Ngram Viewer )